| 摘要 |
Disclosed herein is a filler metal for joining (mainly by high energy density beam welding) a part of porous sintered material to a part of the same material or steel, which gives rise to a weld zone free of such defects as cold cracking and blowholes. The filler metal contains, by weight, at least one selected from the group consisting of Cr, Mo, and Si and at least one selected from the group consisting of Ni, C, and Mn in an amount specified by the equations below Y >=-(1/3)X +23 and Y >=12 where X =Cr(%) +Mo(%) +1.5 Si(%) Y =1.2 Ni(%) +20 C(%) +0.8 Mn(%) and at least one selected from the group consisting of Al, Ti, Zr, and V in a total amount of 0.3-5%, with the balance being Fe and inevitable impurities. The filler metal may be in the form of solid wire or cored wire. The filler metal for arc welding has a composition defined by Y >=-(1/3)X +18 and Y >=7.
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